Fair Value of Financial Instruments Quantitative Information About Significant Unobservable Inputs (Footnote Information) (Detail) - Other Assets - Equity Warrant Asset, Private Portfolio	12 Months Ended
	Dec. 31, 2015
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Weighted average contractual remaining term	5 years 8 months 1 day
Estimated remaining life	2 years 6 months 20 days